Dwyer Series DTFW User manual

Series DTFW Variable-Area Flowmeter for Liquids

Specifications - Installation and Operating Instructions

Bulletin F-DTFW

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

SPECIFICATIONS

ervice: Compatibleliquids.

etted Materials:

ody:316SSorbrass;

Spring:302SS;

Rangespring:302SS;

Magnet:PTFE-coated;

Meteringcone:AcetalorPTFE;

Seals:Buna.

Temperature Limits: -40to200°F(-40to93°C).

Pressure Limit: DTFW-3S:1500psig(100bar);Allothermodels:3000psig(200

bar).

Accuracy: ±2%FS.

Repeatability: ±1%FS.

Size: Diameterdialface2.5˝(63.5mm).

Process Connection: Seemodelchart.

Weight:

DTFW-1Band1S:3lb(1.36kg);

DTFW-2Band2S:5lb(2.27kg);

DTFW-3S:10lb(4.54kg).).

he Series DTFW Variable-Area Flowmeter for Liquids measures water flow

rates with ±2% of full-scale accuracy at an affordable price. Durable metal

construction ensures great compatibility and the strength to withstand system

pressures of up to 3000 psig (200 bar). With a wide variety of flow ranges

available,theSeriesDTFWcanbeusedwithmanydifferentapplicationsallatan

conomicalprice.

alibration

AllSeriesDTFWVariable-AreaFlowmetersforLiquidsarecalibratedatthefactory

for mounting in the horizontal position and should be installed that way for

maximumaccuracy.

Theunitwillnormallyretainitsaccuracytolerancefortheusefullifeofthedevice.

Ifyouwanttochecktheaccuracy,dosoonlywithinstrumentsofcertifiedaccuracy.

Do not attempt to check accuracy with other flowmeters piped in series. Even

minorvariationsinpipingandbackpressurecancausesignificantdifferencesin

indication.Ifindoubt,returntheflowmetertothefactoryforacalibrationcheck.

-1/2

[

38.10]

[177.80]

2.5˝ B-STYLE CASE DTFW OR DTFO 1˝ IN/OUT

3-5/32

[80.26]

[

50.80]

[76.20]

-9/64

[

28.96]

[

76.20]

2-59/64

[

74.17]

˝ NPT

INLET & OUTLET

1-1/2

[38.10]

1/16

[17.53]

/2˝ NPT

NLET & OUTLET

2-59/64

[

74.17]

5-47/64

[145.54]

[25.40]

3/4

[19.05]

-19/32

[

91.44]

[

76.20]

2-59/64

[

74.17]

11/16

[17.53]

/4˝ NPT

NLET & OUTLET

[

50.80]

.5˝ B-STYLE CASE DTFW OR DTFO 1/4˝ IN/OUT

2.5˝ B-STYLE CASE DTFW OR DTFO 1/2˝ IN/OUT

[

25.40]

Connection

1/4˝NPT

1/2˝NPT

1˝NPT

Model

DTFW-1B-1W

DTFW-1B-2W

DTFW-1B-3W

DTFW-1B-4W

DTFW-1B-5W

DTFW-1S-1W

DTFW-1S-2W

DTFW-1S-3W

DTFW-1S-4W

DTFW-1S-5W

DTFW-2B-1W

DTFW-2B-2W

DTFW-2B-3W

DTFW-2B-4W

DTFW-2B-5W

DTFW-2B-8W

DTFW-2B-10W

DTFW-2S-1W

DTFW-2S-2W

DTFW-2S-3W

DTFW-2S-4W

DTFW-2S-5W

DTFW-2S-8W

DTFW-2S-10W

DTFW-3S-10W

DTFW-3S-15W

DTFW-3S-20W

DTFW-3S-25W

DTFW-3S-30W

Range, GPM

Water

0to1

0to2

0to3

0to4

0to5

0to1

0to2

0to3

0to4

0to5

0to1

0to2

0to3

0to4

0to5

0to8

0to10

0to1

0to2

0to3

0to4

0to5

0to8

0to10

0to15

0to20

0to25

0to30

Body

Brass

SS

Metering

Cone

Acetal

PTFE

ocation

electalocationwheretheflowmetercanbeeasilyreadandwherethetemperature

ill not exceed 200°F (93°C). The mounting surface and piping to the flowmeter

shouldbefreefromexcessivevibration.Ifpulsingfloworvibrationcausesexcessive

pointeroscillation,contactfactoryforwaystoprovideadditionaldampening.

ecausethedeviceoperatesthroughamagneticcouplingsystem,magneticmaterial

eartheflowblockcanaffectaccuracy.Tominimizetheeffectofoutsideinterference,

eepmagneticmaterialsatleast3inches(7.6cm)awayfromtheunit.

Inlet Piping

It is a good practice to have the inlet port of the flowmeter be as free of elbows,

restrictions and size changes as possible. Inlet piping should be as close to the

lowmeterconnectionsizeaspossibletoavoidpossibleturbulencewhichcanoccur

ithdrasticsizechanges.Thelengthoftheinletpipinghasverylittleeffectonnormal

ressurefedflowmeters.

Forvacuumservice,theinletpipingshouldbeasshortandopenaspossibletoallow

operation at or near atmospheric pressure, thus maintaining the accuracy of the

device.Notethatforvacuumservice,anyflowcontrolvalvemustbeinstalledonthe

ischargesideoftheflowmeter.

utlet Piping

Pipingontheoutletportshouldbeatleastaslargeastheflowmeterconnection.

peration

fthe mediaislikelytobedirty,itisrecommendedthata50–micronfilterisplaced

pstreamoftheinletporttoassureacleanfluidmediumflowsthroughtheflowmeter.

After all connections are complete, introduce flow as slowly as possible to avoid

damage.Withliquidflow,it maybenecessaryto purgeairfromthe system before

readingsstabilize.Nolubricationorperiodicservicingisrequired.Keepcaseexterior,

ncludingfrontcover,cleanforbestvisibility.

AINTENANCE/REPAIR

ponfinalinstallationoftheSeriesDTFW,noroutinemaintenanceisrequired.The

SeriesDTFWisnotfieldserviceableandshouldbereturnedifrepairisneeded.Field

repairshouldnotbeattemptedandmayvoidwarranty.

ARRANTY/RETURN

eferto“TermsandConditionsofSales”inourcatalogandonourwebsite.Contact

ustomerservicetoreceiveaReturnGoodsAuthorizationnumberbeforeshippingthe

roductbackforrepair.Besuretoincludeabriefdescriptionoftheproblemplusany

additionalapplicationnotes.

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

Dwyer Series DTFW User manual

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